Tool-joint stop



Patented ov. 2, l1926.

UNITED STATES ROBERT A. WILSON, `OF DALLAS, TEXAS,

lParurrr OFFICE.

AssIeNon rro "rmi GU'IBERSoN conroaa- TION, OF DALLAS, TEXAS, A CORPORATION OFI DELAWARE.

TooLfJoINT sror.

' Application ined my 15',

necessary Vthat the threads of one member be positioned in the'blank or intermediate portions of theother` member in order .that the members may be moved longitudinally. `If one memberis turned -too far the' threads which have been carried out of onefpa'nel of threads will be entered into the threads. of the other panel, thus locking 'the members against being disconnected. In view of this it is necessaryto rotate the member which is to be disconnected, to a certain point 4and no further, but it is also essential to rotate the member sutliciently to disconnect the threads. y v

' The. object of the invention `is to provide means for automatically stopping or arresting the rotation of one member relatively of the other so that when the threads of one member are carried out of those of the other member, vfurther rotation will beprevented and the threads cannot-*be entered into the next anel.

A furt er object is to provide means for automatically -cpositioning the members of coupling forisconnection, by stopping a reverse or unscrewing rotation at a predetermined pointwithout calculation or` trial.

Another object isl to provide an obstruction along one vertical edge of the thread panel for preventing that edge enterin the threads of a complementary pane of threads. l

A construction designed to 'carry out the `invention will be hereinafter describedtogether with other features of the invention.

The invention will be more readily understood from areading ofthe following specification and by reference tothe accompanying drawings in whichfan example of the invention is shown, and wherein:

Fig. lis a view of the pin member of a joint constructed in accordance with my invention.

Fig. 2 is-a view of a box constructedin accordance with my invention, a portion being. shown in elevation and a portion in section. v

- parts.

1924.l serial No. 713,420.

Fig.. 3 is an enlarged crossfsectional view vtaken on the line 3--3 of Fi 1 and -"'Fig. 4:.s a plan view of t e box.

In the drawings the numeral 10 designates a `pin member which has a screw threaded.

socket at its upper end to receive the usual screw 'threaded well tubing, stem, lpipe or other tubular conductor 11, with which the joint is used. ThememberlO has a longitudinal bore 12.

The pin member 10 constitutes one portion elements V11 and 14 in the'usual manner; it

being a common practice to make the/T5 threads comparatively tineand to taper the This structure may to the use and the particular conductors which are to be coupled. It is the intention to screw the member 10 and box 13 onto the partsl'l and 14 in'such a manner that they v will remain so connected when the joint is unscrewed or broken.

The member 10 vis provided with a dependin tapered .pin 16. This pin is not taperedr to the degree which has been the practice inthis art, its angle of inclination vary according to the perpendicular bein much less acute than that of the pins ma e under Whittier Patent No. 964,353; The box 13 is formed with a countersunk tapering well 17 for receiving said pin.

The pin is provided with mutilated threads 18 arranged in two panels each occupying substantially one quarter of the circumference of the pin and dis osed diametrically opposite each other. T gaps between the panels.

formed of coarsethreads, the convolutions of which are preferably, spaced sufficiently to admit the forming of a'second thread of .the same pitch, intermediate said convolu.

tions. The second thread is started diametricallyopposite from .the firstthread. From the foregoing it will be seen that one of the Y threads begins at the lower end of one panel;

while the other thread begins at the lower end of the diametrically opposite panel. By this arrangement ample thread bearin is had and a coarse thread is available. t ie his provides The panels are` 2 recaen within the scop'e of the invention to utilize 'a single thread. i

The well 17 is provided with threads 19 which are mutilated and formed into diametrieally opposed panels having substantially the same width as'the gaps between the panels of .the pin, so that the pin may be inserted in the Well 17 and the threads' 18 thereof, received in the gaps between the threads 19 of the box 13.- It is merely necessary to insert the pin 16 in the well17 and give the member 10, a quarter turn or rotation, .whereby the threads 18 ride into the threads 19`and couple the parts of the joint together.

It will be apparent that some means for guiding the blunt ends of the threads 18 between the `threads 19 should be provided,'l`

otherwise the ends of the threads would abut and prevent threading. To care for this I provlde at the bottom of'the well, continuations- 20 of the threads 19, for each of the double threads 18. These continuations 2O connect the panels and when the pin 16 is inserted in the well 17 the threads 18 of the panels are received upon Said continuations,

which guide said threads 18 into the -threads '19 of the panels of the box, when the member 10 is rotated. It will be seen ythat the threads 18 of the pin will freely enter the threads 19 of the box.

The main feature of the invention has to' do with means for limiting-the counter or reverse rotation of the pin when it is desired todisconnect or uncouple the joint. It will be apparent that when the member is rotated -to unscrew it, the threadsv 18 will ride out of one panel and into the threads vof the other panel unless the rotation is stopped with such nicety as to bring the threads 18 wholly within the gaps between the threads 19. To do this re uires that either the correct position be ca eulated or marks made upon the in and box for registration at this position. Euch marks would be obscuredor obliterated in man cases and are not practical.

not enter the threads of the other panel in the box, consequently the pinV would be arrested with the threads 18 within the gaps between the threads 19 of the well 17.

In carrying out this feature many instrumentalities could be employed and I have obtained satisfactory results by portions of the metal between the ends of the threads 18 to form bosses 21.- Th-is may be easily accomplished in cutting the threads. It is obvious that these bosses upon a reverse rotation of the pin, would not enter between the threads 19. It is also apparent to those skilled in the art that other means might be worked out for the purpose. The invention contemplates any means whereby the pin is brought to a positive stop when lits threads are clear of the threads 19.

What I claim, is: v

I. A coupling comprising in combination` a pin having threads arran ed in spaced panels on diamet-rieally opposite sides thereof, a box having a well shaped to receive said pin and provided with threads arranged in Spacedpanels to mesh. with the threads of the pin, and means within one set of threads for preventing the threads of the panels of the pin from entering the threads of the panels of the box upon a releasing rotation of the pin.

2. A coupling comprising a' pin having threads arranged in spaced panels on diametrically opposite sides thereof with an unobstructed intermediate gap, a well shaped box to receive said pin and provided with threads extending for the width 0f said gap and arranged in spaced panels to mesh with the threads of the pin, and an abutment within the thread panels of the pin to limit its travel when the pin is rotated in a releasing direction.

3. A coupling comprising in combination, a pin having threads arranged in spaced panels on diametrieally opposlte sides thererin of with an unobstructed intermediate gap, f

pin and provided with threads arranged in spaced panels to mesh with the threads of t e pin when rotated in one direction, and

-a box having a well shaped to receive said' bosses between the trailing ends of the thread panels of the pin for preventing the entrance of said threads between the threads of the panels of the box upon a reverse rotation of the pin.

In testimony whereof I aiix my signature.

ROBERT A. WILSON. 

